Synthesis and Behavior of α-Iminocarboxyamide Nickel and Zirconium Catalysts Towards Olefin Polymerization

Synthesis and investigations of nickel-based olefinoligomerization and polymerization catalysts, α-iminocarboxyamideì3-penzyl ni(ii) complex(2) is reported. the attempt to improve theyield of the synthesis of the above mentioned catalysts by the directreaction of the potassium salt of the ligand, ni(cod)2(bis(1,5-cyclooctadiene)-nickel, and benzyl halide in thf and startingtemperature of -35°c. led instead to disclose that the less hinderedn-aryal moieties on the diimine complexes the more difficult tosynthesize the ethylene polymerization catalyst, instead, yielding thedi α -iminocarboxyamide ni-complex(5) which is inactive towardsethylene polymerization. this promoted us to synthesize the complexdi α-iminocarboxyamide zr-complex(6) which is activated by maofor ethylene polymerization.